Model "1465" Pressure Reducing Regulator,; 1/4" Size,0.109" Orifice; Cf8m SST Body & SST Spring Chamber; S1 Trim: 316SST With Stellite Seat,302SST Diaphragm; Npt Screwed; 10-80 PSIG Range Spring; Opt-25: 1/8" Npt Spring Chamber Vent Tap; Opt-55: Cleaned For Oxygen Service Per Spec #S-1134